package com.atguigu.springcloud.controller;
import com.atguigu.springcloud.entities.CommonResult;
import com.atguigu.springcloud.entities.Payment;
import lombok.extern.slf4j.Slf4j;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;
import javax.annotation.Resource;
import java.net.URI;
import java.util.List;

@RestController
@Slf4j
public class OrderController {

    //private static final String PAYMENT_URL="http://localhost:8001";
    //通过在eureka上注册过的微服务名称调用
    private static final String PAYMENT_URL = "http://CLOUD-PROVIDER-SERVICE";

    @Resource
    private RestTemplate restTemplate;
    /**
     * 自定义负载均衡规则
     */
//    @Resource
//    private LoadBalancer loadBalancer;
//    @Resource
//    private DiscoveryClient discoveryClient;

    @GetMapping("/consumer/payment/create")
    public CommonResult<Payment> create(Payment payment){
        return restTemplate.postForObject(PAYMENT_URL+"/payment/create",payment,CommonResult.class);
    }

    @GetMapping("/consumer/payment/get/{id}")
    public CommonResult<Payment> getPayment(@PathVariable("id") Long id){
        return restTemplate.getForObject(PAYMENT_URL+"/payment/get/"+id,CommonResult.class);
    }

    @GetMapping("/consumer/payment/getForEntity/{id}")
    public CommonResult<Payment> getPayment2(@PathVariable("id") Long id){
        ResponseEntity<CommonResult> entity = restTemplate.getForEntity(PAYMENT_URL+"/payment/get/"+id,CommonResult.class);

        if(entity.getStatusCode().is2xxSuccessful()){
            return entity.getBody();
        }else{
            return new CommonResult(444,"操作失败");
        }
    }
    /**
     * 路由规则：轮询
     * @param 
     * @return 
     */
    @GetMapping(value = "/consumer/payment/lb")
    public String getPaymentLB(){
//        List<ServiceInstance> instances = discoveryClient.getInstances("CLOUD-PROVIDER-SERVICE");
//        if(instances == null || instances.size() <= 0){
//            return null;
//        }
//        ServiceInstance serviceInstance = loadBalancer.instances(instances);
//        URI uri = serviceInstance.getUri();
//        return restTemplate.getForObject(uri+"/payment/lb",String.class);
        return restTemplate.getForObject("http://localhost:8001" + "/payment/lb", String.class);
    }
    //============> zipkin + sleuth
    @GetMapping("/consumer/payment/zipkin")
    public String paymentZipkin(){
        String result = restTemplate.getForObject(PAYMENT_URL + "/payment/zipkin", String.class);
        return result;
    }
}